Enforce Design Language System adherence in Flutter. Use when implementing design tokens, preventing hardcoded colors/spacing, or building a DLS.
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Zero tolerance for hardcoded design values.
Before UI refactoring, identify project's Theme Archetype:
main.dart: Look for MaterialApp theme configuration.VThemeData(...).toThemeData() or extensive ThemeData overrides → use Theme.of(context).textTheme / theme.textTheme.VTypography.*) only when no global theme bridge exists, or when defining theme itself.VColors.*, AppColors.*), never Color(0xFF...) or Colors.red.VSpacing.*), never magic numbers like 16 or 24.theme.textTheme.* for adaptive UI. Use VTypography.* tokens only for theme definitions or non-contextual logic. Never use inline TextStyle.VBorders.*), never raw BorderRadius.VButton) over raw Material widgets (ElevatedButton) if available.Color(0xFF...) strictly forbidden.Colors.blue forbidden in UI code.SizedBox(height: 10) forbidden.TextStyle(fontSize: 14) forbidden.ElevatedButton when VButton exists.mobile-ux-core | flutter/widgets | idiomatic-flutter
When this skill applies, preserve the following domain terminology or equivalent concrete examples in the answer when relevant:
ElevatedButton
SizedBox
VColors
magic number
Additional task-grounded exact anchors: TextStyle
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Upgrade an Android project to Android Gradle Plugin (AGP) 9. Use when migrating to AGP 9, updating Gradle build files, migrating to built-in Kotlin, or adopting the new AGP DSL.
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Apply Clean Architecture layering, modularization, and Unidirectional Data Flow in Android projects. Use when setting up project structure, placing code in layers, configuring feature/core modules, or implementing UDF patterns; defer Compose state and ViewModel/StateFlow implementation to their specific skills.
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Implement WorkManager and background processing correctly on Android. Use when creating Worker classes, scheduling tasks, choosing between WorkManager and Foreground Services, or setting up Hilt in workers; defer FCM and notification delivery to android-notifications.
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Build high-performance declarative UI with Jetpack Compose. Use when writing Composable functions, optimizing recomposition, hoisting state, or working with LazyColumn and side effects; defer deep-link and navigation routing to android-navigation.
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Migrate an Android XML View to Jetpack Compose following a structured 10-step workflow. Use when converting XML layouts to Compose, setting up Compose in an existing View-based project, or incrementally adopting Compose.
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Write correct coroutine scopes, lifecycle collection, and dispatcher injection in Android production code. Use for suspend functions, coroutine scopes, and dispatcher mechanics; defer ViewModel StateFlow/LiveData architecture, Fragment lifecycle recipes, persistence/notifications, and unit-test recipes to their specific skills.
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